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Although different brands of conductivity metars , calibration procedures are similar for al, <br /> of them. <br /> . A generalized calibration procedure follows: <br /> 1: Turnon the instrument,check the battery,and allow to warm up if necessary- <br /> essary2- Rinse the conductivity probe and temperatureprobe with deionized water then place in <br /> the standard solution. At For' conductivities are usually within 500 to 1500 <br /> utnhos/l,therefore the 1000 os/1 solution is appropriate to use. <br /> 3. Adjust the-meter for the appropriate conductivity scale and temperature then read the <br /> conductivity. <br /> `I- If required use.the "calibrate" adjustment on the.meter to correct.the instruiueni to read <br /> the correct conductivity. <br /> The calibration process will be.recorded on a conductivity caDration log:-Copies of calibration. <br /> logs f®a-each individual-instrument arc-kept in-a:binder.-at the office; The logs am acvicwed <br /> periodically to assess whether the- instrument is becoming more difficult to calibrate and <br /> therefore needs adjustment by the ,or if new probes are require(L <br /> Turb'tditV Mctcr <br /> Turbidity Measurement is subject to variations due to insmMent drift_ For this zeason turbidity <br /> meters must be calibrated before and after sampling on each•clay and at.l+ st oace more duiing <br /> the day. - To cah'bratc a turbidity meter-the instrument reading is adjusted to read corncctiy for <br /> solutions with a standard turbidity. <br /> StanClard turbidity solutions are mixed fiesii, according to a instructions, for 'each. <br /> sampEng event Standard solutions for UrWdity are commercially availableThese _,tindArds - <br /> Mdmsed fiesh and discarded-aft= life has expized. Shelf lives vary dependingon the <br /> of standards used. if pre solution is used, t&eviration date of&e solution <br /> be no on the cahibration Iog. <br /> Although different brands'of idity meters vary, calibration procedures are,similar for all of <br /> thttm A generalized calibration proceduse follows: <br /> 1• <br /> TUM on the instrunicM4 check the battery,and allow to warm up if nccessarf_`23-483 _- <br /> E49-FOP23 tOR32S A-4 htty Id, <br /> .lac <br />